Paper Number
PO55 

Session
Poster Session

Title
Engineered transparent emulsion to optically study the flow in yield stress fluid suspensions

Presentation Date and Time
October 23, 2019 (Wednesday) 6:30

Track / Room
Poster Session / Ballroom C on 4th floor

Authors (Click on name to view author profile)

1. Rashedi, Ahmadreza (Ohio University & Universite de Bordeaux, Mechanical engineering)
2. Ovarlez, Guillaume (Universite de Bordeaux, Physical Chemistry)
3. Hormozi, Sarah (Ohio University)

Author and Affiliation Lines (in printed abstract book)
Ahmadreza Rashedi¹, Guillaume Ovarlez², and Sarah Hormozi^3
1Mechanical engineering, Ohio University & Universite de Bordeaux, Athens, OH 45701; ²Physical Chemistry, Universite de Bordeaux, Pessac, Bordeaux 33600, France; ³Ohio University, Athens, OH 45701

Speaker / Presenter 
Rashedi, Ahmadreza

Text of Abstract
We have engineered a model suspension consisting of rigid particles and yield stress fluids. The suspending fluid is an emulsion with adjustable density, rheological behavior, and refractive index. We explain the design procedure in detail. The optically transparent emulsion opens the possibility of exploring Particle Tracking/Image Velocimetry (PIV/PTV) techniques in studying dynamic flows involving particles in complex fluids. As a proof of concept, we have performed PTV to provide accurate measurements of solid volume fractions for the dispersion of particles in a Taylor-Couette cell.